Mixing-machine.



W. McRAE.

MIXING MACHINE. APPLICATION FILED JUNE 15, 1909.

941,267, Patented Nov. 23, 1909.

2 SHEETS-SHBET 1.

WITNESSES II'IVEIVTOR y ln'zilzvwgeae MW ATTORNEYS W. MGRAE.

MIXING MAGHINE.

APPLICATION FILED JUNE 15, 1909.

941,267. 7 Patented Nov. 23, 1909.

2 SHEETS-SHEET 2.

WITNESSES INVENTOH WzY/za 712 $7 1900 jai I W ATTORNE Y8 UNITED STATES PATENT OFFICE.

WILLIAM MCRAE, OF EASTMAN, GEORGIA.

MIXING-MACHINE.

To all whom it may concern:

Be it known that I, l/VILLIAM MCRAE, a citizen of the United States, and a resident of Eastman, in the county of Dodge and State of Georgia, have invented a new and Improved l/Iixing-llfachine, of which the following is a full, clear, and exact description.

This invention relates to mixing machines of the rotatable box type, and the improvements are designed more particularly for a machine for the mixing of guano or commercial fertilizer.

The object of the invention is to provide a simple and eflicient device for the purpose designated.

The machine comprises a rectangular box mounted for rotation about one of its diagonals as an axis, and a series of stationary paddles mounted within the box on a shaft disposed on said diagonal. Preferably, the box is of elongated rectangular form, and the paddles, mounted transversely of their shaft, increase in length from the paddles at the ends of the series to the center paddle. By this arrangement the material is eifectively agitated and mixed, being moved lengthwise of the series of paddles as well as transversely of the axis of rotation.

Various novel details of construction will be described as the specification proceeds.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a vertical longitudinal section through the machine; Fig. 2 is an end view, looking from the right of Fig. l, the handle crank being omitted; Fig. 3 is a detail transverse section across the shaft supporting the paddles; and Fig. 4 is a detail of the journal box, looking toward the left of Fig. 1.

Referring to these views, the letter A designates the box, preferably of elongated rectangular form, and desirably provided in one side with a hinged cover B, for affording access to the interior.

The box A is rotatable about one of its diagonals as an axis, and to this end the corners at the ends of this diagonal are preferably fitted with castings C, D, having tubular portions a, b, constituting journals, which rest in journal boxes E, F, preferably open. A handle crank G may constitute the means for revolving the box A, and this handle Specification of Letters Patent.

Application filed June 15, 1909.

Patented Nov. 23, 1909. Serial No. 502,227.

may be secured to a squared projection (Z of the journal a.

A minor feature of the invention resides in the formation on the castings C, D of blocks 6, 7, which project inward through and fit within openings formed at the corners of the box, thus considerably strengthening these regions.

H is a shaft, preferably square, located in the interior of the box on the diagonal axis of rotation thereof, and which passes through the portions 7) and f of the casting D and is held against rotation in a square hole g, of an upright outer wall it of the journal-box F. Mounted rigidly on this stationary shaft is a series, or preferably two series, at right angles to each other, of paddles I, which are disposed transversely of the shaft. These paddles increase in length from the end paddles to the middle ones of the series. By reason of the box A being of elongated rectangular form, the material operated upon is moved longitudinally of the series of paddles, as well as about the axis of rotation.

Preferably, the paddles are drawn together and held rigidly as a unit by means of bolt rods 2' having nuts on outside of end plates a that bear against the end paddles. A desirable feature is the provision of cylindrical portions 7) projecting outward from the plates 11 into the castings C, D, and serving as inner bearings about which these castings revolve. The shaft H passes through these projections 79.

The frame K on which the journal-boxes E F are mounted may be of any suitable construction.

Having. thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A mixing or agitating machine, comprising a rectangular box provided at two diagonally opposite corners with journals, journal boxes in which said journals are received, means for rotating the box, one of said journal boxes having an upright outer wall provided with a square opening, a square shaft within said box, passing through one of said journals into said square opening, and a series of stationary paddles mounted on said shaft within said box.

2. A mixing or agitating machine, comprising a rectangularbox, castings secured to two diagonally opposite corner regions of said box and having outward projecting journal portions, journal boxes in which said journal portions are received, a fixed shaft disposed within said box on the diagonal between said two corner regions, a series of stationary paddles carried by said shaft, end plates bearing against the ends of suchseries of paddles, bolts adapted todraw said plates together, and cylindrical projections extending outward from said end plates into said castings and constituting inner bearings, said fixed shaft passing through said cylindrical projections.

3. A mixing or agitating machine, comprising a rectangular box mounted for rotation about one of its diagonals as an axis, a shaft disposed within said box on said diagonal, a series of stationary paddles carried by said shaft, and means for drawing the paddles together and holding them rigidly in position.

4. A mixing or agitating machine, comprising a rectangular box mounted for rotation about one of its diagonals as an axis, a shaftd-isposed within said box on said diagonal, a series of stationary paddles carried by said shaft transversely thereof, said paddles increasing in length from the end paddles to the middle paddles of the series, and means for drawing the paddles together and holding them rigidly in position.

5. A mixing or agitating machine, comprising a rectangular box provided at two diagonally opposite corners with journals, journal boxes in which said journals are mounted, a fixed shaft disposed within said box on the diagonal between said corners, paddles secured on said shaft, end plates bearing against the end paddles, means for drawing said end plates toward each other, and projections on the end plates extending into the said journals, the said shaft passing through said projections.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WVILLIAM MoRAE.

lVitnesses R. B. EnwARns, J. I. HARRELL. 

